Typewriting machine



May 27 1924. 1,495,963

| PERESZLENYI TYPEWRITING MACHINE Filed April 5, 1922 2 Shats-Sh eet 1 May 27, 1924. 1,495,963

| PERESZLE ZNYI TYPEWRITING MACHINE Fil ed April 5, 1922 2 Shee8$heet 2 Patented May 27 1924.

UNITED STATES PATENT OFFICE.

LUDWIG PEBESZLENYI, 0F BUDAPEST, E'UNGARI .ASSIGN'ORv OF ONE-HALF T0 MICHAEL BERTOK, OF BUDAPEST, HUNGARY.

TYPEWRITING MACHINE.

Application filed April 3, 1922. Serial N0. 549,835.

To all whom it may concern:

Be it known that I, LUDWIG PEREszLNYI, a citizen of the Kingdom of Hungary, residing at Budapest, Hungary, have invented certam new and useful Improvements in Typewriting Machines, of which the following is a specification.

This invention relates to a typewriting machine which, owing to its compendious build and to the peculiar construction of the working parts fulfills all requirements as regards applicability, efliciency, durability, visible working and the like. The improved typewriter is of such compact sizeand of such a light weight that it can be easily carried along on journeys. Owing to the small size and to the simple construction the cost of manufacture is very moderate.

In order that the invention may be clearly understood, I shall proceed to describe the same with reference to the form of construction shown, by way of example, on the accompanying drawings, wherein:-

Fig. 1 is a plan view.

Fig. 2 is a vertical cross section along the middle line of the typewriting machine.

Fig. 3' is a similar plan view as Fig. 1, the keys, type levers, cover plate and paper carriage being removed.

Fig. 4 shows part of the paper c'arriage in front elevation on enlarged scale.

Fig. 5 is a cross section of the paper carriage.

Fig. 6 is a similar section taken at the point where the supporting device for the ribbon is arranged.

Fig. 7 shows the spacing key in elevation, partly in section, and the arrangement of the same in the machine frame.

Referring to the drawings the frame of the typewriting 1iizachine consists of a boxshaped casing 2 ed by means of screws 1. At the upper middle part of the casing 2 a circular comb-shaped segment 3 is fixed in which an arc-shaped shaft 4 is mounted.

The type levers 5 are pivotably mounted upon the shaft 4 so that each lever engages with the space between two teeth of the segment 3 (Figs. 1-3). Each ty e lever 5 has two types, one for the capita and; one for the small letter, the number of type levers being thus reduced to half of the ordinary number. The lower half of the hub of each ty e lever forms half of a toothed wheel 6 ig. 2). Each toothed wheel 6 meshes with a toothed segment 10 at the front end of the corresponding key lever 9. The key levers 9 are pivotably mounted upon a shaft 8 and at the outer or rear ends of the key I levers the keys 7 are articulated in the well known manner. By depression of a key 7 the corres onding key lever 9 is made to oscillate an the type at thewd of the corresponding type lever is printed upon the paper on the platen.

Owing on the one hand to the teeth at the lower half ofthe hubs of the type levers and on the other hand to the toothed segments at the front end of the key levers, it has been rendered possible to arrange the key levers in the same plane as the type levers, said type levers being perfectly guided in the spaces between the teeth of the segment 3 and a separate connecting link between the two kinds oflevers being avoided.

The platen carriage consists of the platen 11 and of an enevelope 12 of semi-circular cross section partly enclosing the casing. Sufficient space is left between the platen and the envelope so that the paper sheet can be easily inserted and fed by the rotation of the platen. According to the form of construction shown the platen 11 is a regular ten-faced prism, the width of one of the faces being greater than the height of the capitals. The types are thus printed upon plane faces, wherefrom results the advantage that the print-like typing has the same intensity at all points; which is not the case with the typewriting machines of known construction.

On the envelope 12, the circumference of which is in cross section greater than a semicircle, a tube 13 is fixed which extends over the entire length of the envelope. This tube 13 has slits 14 which are parallel the one' to the other and perpendicular to the longitudinal axis of the tube '(Figs. 3-5) so that The tube 13 is guided in a slit sleeve 17. At the ends of the sleeve 17 rods 18 of square cross section are fixed which are guided in tubes 20 fixed upon the bottom plate 19 of easing 2.

To make the machine ready for use the rods 18 are pulled out of the tubes 20 so far that the conical cavities 21 in the front face of rods 18 are exactly below the screws 22 (Fig. 2), the rods 18 and the guide sleeve 17 for the platen 11 being secured in their position by means of said screws 21. If the machine is not to be used the screws 22 are loosened and the rods 18 pushed into the tubes 20 so that the paper carriage comes in contact with the casing 2 (Fig. 1).

The platen 11 is located in the envelope 12 and as this envelope is of greater circumference in cross section than a semi-cir cle, as stated above, the platen cannot drop out of the same. The paper sheet is inserted into the interval between the platen 11' and the envelope 12. In order to turn the platen 11 together with the envelope 12 one of the ends of the platen is gripped with the hand and tilted in forward direction. At this angular rotation the tube 13 rigidly connected with the envelope 12 rotates in the slitted sleeve 17 which serves for guiding the tube 13 and the envelope 12 with the platen when these parts are being shifted step by step after each printing of a ty e. The slits 14 of tube 13 facilitate the ti ting of the platen. The tilting of the platen is limited by the longitudinal edge 43 shown in Fig. 3.

As the typewriting machine is of light weight and compendious build it might happen that when the carriage is being stepwise moved the machine is also moved on its support. To avoid this pressure bows 23 are provided which are inserted into the lower open ends of tube 20 below the key board in order to be fixed to the table by means of the thumb screw 24. When the machine is not to be used these pressure bows 23 are placed parallel to the bottom plate 19 and inserted in the lower ends of tubes 20 (Fig. 1).

The device which serves for shifting the paper carriage after the printing of one type is constructed as follows:

Upon the sleeve 17 which serves as guide for the paper carriage a cap 26 is fixed (Figs. 2 and 3) in which the toothed wheel 16 is mounted so that it can revolve around a vertical shaft 27. The toothed wheel 16 is preferably capsule-shaped so that a helical blade spring 28 can be located in the same. One end of this spring is fixed to the stationary shaft 27 and its other end is fixed in the wall of the toothed wheel 16. The spring 28 has the tendency to make the toothed wheel revolve anti-clockwise (Fig.

es es 2). The toothed wheel is however locked by a pawl mechanism which consists of a two-armed pawl (30) ivotably mounted upon a pin 29 fixed in t e cap 26 and of a blade spring 31 designed to press the pawl against the toothed wheel. The blade spring 31 controls normally the toothed wheel in such a manner that the nose 32 of the twoarmed pawl 36 is brought in engagement with a space between two teeth of the ratchet Wheel, whereby said ratchet wheel is pre' vented from revolving. If the two-armed pawl 30 is however oscillated by means of a rod 34 hingedly connected with stud 33 so that its nose 32 is pulled out of the space between two teeth against the action of spring 31, the helical spring 28 begins to act, whereby the toothed wheel 16 is revolved in anti-clockwise direction. As the tubular rack 13 engages with the toothed wheel 16 the tube is consequently shifted to the left and with the same the envelope 12 and the paper carriage. The ratchet wheel 16 can however execute only a determined part revlution as when the nose 32 disengages from one space between teeth the other nose 35 of the two-armed pawl 30 engages with another space between two teeth so that the distance for which the carriage is shifted is equal to the length of the are which, measured on the pitch circle of the toothed wheel corresponds with the angle of revolution. This stepwise shifting in the direction of the line typed can be varied in accordance with the types (characters and signs).

The stepwise movement of the carriage after each printing of a type or after each word typed is effected by the pushing forward of rod 34. With this object in view the rod 34 is hingedly connected with a second rod 36. The inner end of this rod 36 is further hin edly connected with the arm 37 of a bow w ich is oscillably mounted upon the shaft 8. The second arm of this bow has a shoe 38' upon which rests the rail 39. When a key 7 is being depressed the rail 39 which is arranged transversely under the key levers 9 is lowered against the action of springs 40, so that it moves towards the bottom plate 19. This movement of rail 39 causes the oscillation of the how 37, 38 whereby th arm 37 of the how by means of the rods 36 and 34 hingedly connected with the same, makes the two-armed pawl 30 swing in such a manner that the above described stepwise movement of the paper carriage is produced.

The spacing key 41 is arranged in front of the front row of keys 7. The arms 42 of this spacing key 41, pivotable around shaft 8, act upon the rail 39 controlled by spring 40 in a similar manner as it is operated by one of the key levers 9.

Each type lever 6 has, as mentioned above,

two types. ,Normally the inner types (small letters) are used for typing, the envelope 12 in which the platen is mounted being in the osition shown on Fig.- 3. If the outer type has to be printed the platen 11 andv its envelope 12 must be tilted forward through a determined angle (position indicated on Fig. 3 in dash-and-dot lines) so that the outer types are printed in alignment with the imressions of the inner ty es. With this-obect in view the tube 13 ed upon envelope 12 is rotatably mounted in the guide sleeve 17, the am litude of the rotation of tube 13 or of the t1 ting forward of the platen being limited by the front longitudinal edge 43 of th slit sleeve 17 with which the envelope comes in contact. 7

At each end of the platen a spool 45 is arran ed, said spools, controlled by circularly ent springs 44, holding the ribbon which consequently is shifted stepwise together with the aper carriage.

A guide-fork 4 serves to accurately guide the type levers 3 during the printing operation and to prevent that the type lever moves in lateral direction.

The description of the improved typewriting machine is given only by way of example and it is evident that the various parts of the same can be modified according to requirement without departing from the invention.

I claim 1. An improved typewritin machine comprising in combination wit the key board, the key levers and the type levers, a box-shaped casin in which the key board, the key levers and t e type levers are mounted, the paper carriage, 'a slitted sleeve on which said pa er carria is mounted and guides for said slitted save which permit to adjust the position of said sleeve and paper carriage with regard to the said boxshaped casing.

2. An improved typewriting machine comprising in combination with the key board, the key levers and the type levers, a box-shaped casin in which the key board, the key levers and t e type levers are mounted, the paper carriage, a slotted sleeve in which sa1d paper carriage is mounted, tubu lar supports fixed upon the bottom of the box-shaped casing, rods fixed to the said sleeve telescoped in said tubular supports and means for fixing said rods in said tubu-' lar supports so that the position of said sleeve with the paper carriage can be varied with regard to the box-shaped casing.

3. An improved, typewriting machine comprising in combination with the key board, the key levers and the type levers, a box-sha ed casing in which the key board, the key evers and the type levers are mounted, the paper carriage consisting of a platen in the shape of av hollow prism of polygonal crosssection, of an envelope of semi-circular cross section enclosing said platen for approximately half its height, and a tube xed upon the outer surface of said envelope and extending over the ent-ire len h of the machine a box-shaped casin in which the key board, the key levers and t e type levers are mounted, the slpaper carriage consisting of a platen in the ape of a hollow prism'of polygonal cross section, of an envelope of semi-circular cross section enclosing said platen for ap-' proximately half its height, and a tube fixed uponthe outer surface of said envelope and extendin over the entire length of the same having s ots which stand perpendicular 'to the longitudinal axis of said tube so that the tube forms a rack, a slotted sleeve in which said tube is guided, a ratchet wheel designed to produce the stepwise shifting of said paper carriage meshing with said tubular rack, and guides for said slotted sleeve which permit to adjust the position of said slotted sleeve and paper carriage with regard to the said box-shaped casin 5. %h an improved typewriting machine as described and shown in combination with the slotted guide tube for the paper carrings a cap fixed to said slotted guide tube, a vertical shaft fixed in said cap, a toothed wheel revolubly mounted upon said shaft and meshing with the slots of said tube, a helical spring in said capsule shaped toothed wheel fixed with one end to said vertical shaft and with its other end to said toothed wheel.

6. In an improved typewriting machine as described and shown in combination with the toothed wheel driven by the helical spring, a two-armed pawl pivotably mounted in said cap, a blade sprin acting upon said pawl so that the end 0 one arm of the same engages with said toothed wheel and stops the same, and a system of bin ed rods hingedly connected wit said pawl esigned to make the two-armed pawl oscillate so that its arm releases the toothed wheel to revolve, the end of the other arm of the pawl coming directly afterwards in engagement with said toothed wheel to stop'the same again so that the toothed wheel can execute only a determined part revolution for shifting the paper carriage for a determined amount.

7. In an improved typewriting machine the key board, the key levers and the type levers,

as described and shown in combination with nected with said oscillating bow so that it 10 the two armed pawl and the ratchet wheel, makes this bow swing at the depression of of a system of hinged rods controlling said a key lever.

pawl hingedly connected at one end with In testimony whereof I afiix my signasaidpawl, a bow mounted so that it can ture in presence of two witnesses.

oscillate the other end of said system of LUDWIG PERESZLENYI.

hinged rods being hingedly connected with Witnesses: said bow, and a spring influenced transverse RADvANYI ZSTRAN, rod arranged under the key levers and con-' D. KLEwHY. 

